Which Cook monument are you talking about - the one on the top of Easby Moor - The obelisk is made of locally quarried sandstone and stands 60 feet high (18m). Topping the monument is a 'benben' stone; a pyramidal capstone.
It is also over 1000 ft up on top of Easy Moor.
What could and should happen is a new plaque be put up there.
But once again to state that James Cook was not involved in the slave trade. He worked with a Pacific islander Tupaia who acted as a navigator, translator, ambassador-diplomat. Cook and Joseph Banks toured the country with another islander Mai who was lauded as a celebrity. Mai met the Royal Society, went to Paris and had an audience with King George III.